NDLI: A generational on-the-fly garbage collector for Java

Content Provider	ACM Digital Library
Author	Domani, Tamar Petrank, Erez Kolodner, Elliot K.
Abstract	An on-the-fly garbage collector does not stop the program threads to perform the collection. Instead, the collector executes in a separate thread (or process) in parallel to the program. On-the-fly collectors are useful for multi-threaded applications running on multiprocessor servers, where it is important to fully utilize all processors and provide even response time, especially for systems for which stopping the threads is a costly operation. In this work, we report on the incorporation of generations into an on-the-fly garbage collector. The incorporation is non-trivial since an on-the-fly collector avoids explicit synchronization with the program threads. To the best of our knowledge, such an incorporation has not been tried before. We have implemented the collector for a prototype Java Virtual Machine on AIX, and measured its performance on a 4-way multiprocessor.As for other generational collectors, an on-the-fly generationalcollector has the potential for reducing the overall running time and working set of an application by concentrating collection efforts on the young objects. However, in contrast to other generational collectors,on-the-fly collectors do not move the objects; thus, there is no segregation between the old and the young objects. Furthermore, on-the-fly collectors do not stop the threads, so there is no extra benefit for the short pauses obtained by generational collection. Nevertheless, comparing our on-the-fly collector with and without generations, it turns out that the generational collector performs better for most applications. The best reduction in overall running time for the benchmarks we measured was 25%. However, there were some benchmarks for which it had no effect and one for which the overall running time increased by 4%.
Starting Page	274
Ending Page	284
Page Count	11
File Format	PDF
ISSN	03621340 15581160
DOI	10.1145/358438.349336
Journal	ACM SIGPLAN Notices (SIGP)
Volume Number	35
Issue Number	5
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1983-05-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Garbage collection Memory management Generational garbage collection Programming languages
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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